Around 6,000 chickens were culled in Patna after the Animal Resource Department found the poultry birds infected with avian influenza.   Officials said the infected birds were found at the Poultry Research and Training Centre operated by Bihar Animal Sciences University in Kaushal Nagar, Chitkohra, near the airport area. Following laboratory confirmation, the Dairy, Fisheries and Animal Resources Department ordered immediate culling and burial of all chickens at the facility. The entire locality has since been sanitised, and residents have been advised to follow strict precautionary measures. On the instructions of the Patna District Magistrate, the movement of chickens and roosters into and out of the municipal limits has been completely banned. The district administration has declared a 1-kilometer radius around the affected poultry farm as an infection zone and a 9-kilometer radius as a surveillance zone. Entry of eggs, poultry birds and feed into these areas has been prohibited unless accompanied by proper sanitisation certification. Given the dense population around the Chitkohra bridge near the airport, surveillance has been intensified. A check-post has been …